<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<body>
    <script>
        var arr=["aaa","bbb","ccc"];
        var separate ="|";
        var link=arr[0];
        for(var i=1;i<arr.length;i++){
            link +=separate +arr[i];

        }   
        console.log(link); 
        </script>
</body>
</html>